2561945410 has 8 divisors (see below), whose sum is σ = 4611501756. Its totient is φ = 1024778160.

The previous prime is 2561945333. The next prime is 2561945437. The reversal of 2561945410 is 145491652.

It can be written as a sum of positive squares in 2 ways, for example, as 2405019681 + 156925729 = 49041^2 + 12527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2561945410.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128097261 + ... + 128097280.

Almost surely, 2^2561945410 is an apocalyptic number.

2561945410 is a deficient number, since it is larger than the sum of its proper divisors (2049556346).

2561945410 is a wasteful number, since it uses less digits than its factorization.

2561945410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256194548.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 2561945410 is about 50615.6636823029. The cubic root of 2561945410 is about 1368.3271908835.

The spelling of 2561945410 in words is "two billion, five hundred sixty-one million, nine hundred forty-five thousand, four hundred ten".